查询词典 difficult to

China Engineering and the teaching has yet to fully utilize the power of MATLAB, MATLAB existing books mostly as a computer application tool there, not with the specific disciplines of organic materials combined, MATLAB GUI interface design, will be teaching content according to a certain order of the structure, using simple language, a rich display screen in front of the students. not only improes the students interested in this program, also makes some of the more abstract concepts of the past and the process of teaching students to reflect difficult to understand and master the content, through iid, image of the method explained to the students, so that students more easily understand and grasp. MATLAB and the emergence of soling this problem, MATLAB based on its powerful calculation and graphics functions so as to sole the problem, The system is controlled teaching address the dull, abstract characteristics do.

而我国工科类的教学还未能充分利用MATLAB的强大功能，现有的MATLAB书籍大都作为计算机应用工具书出现，未能与具体学科的教材有机地结合起来，MATLAB中的GUI界面设计，将教学内容按照一定的结构顺序，用简洁的文字、丰富的画面展现在学生面前，不仅提高了学生学习本课程的兴趣，还使得一些比较抽象的概念和过去教学过程中学生反映难以理解和掌握的内容，通过生动、形象的方法向学生阐明，使学生更容易理解和掌握，而MATLAB的出现解决了这一问题，MATLAB基于它强大的计算和绘图功能从而解决了这一问题，本系统就是针对解决控制教学中的枯燥，抽象的特点而做的。

Although majority of tooths move a cause of disease more complicated, it is difficult to cure to used to think of disease, in recent years along with medical science technique development, it cures effect to continuously raise, not a few sufferers has been cured actively and not only reserved to suffer from a tooth, but also maintained mastication function.

虽然多数牙动病因较复杂，过去曾认为是难治之症，但近年来随着医学技术发展，其治疗效果不断提高，不少患者经过积极治疗，不但保留了患牙，而且维持了咀嚼功能。

It is difficult to train a schutzhund dog to track in such a way that the pressure needed to get the dog to slow down and conform to the rules does not bleed over into the obedience work.

当存在压力，迫使犬放慢脚步时，很难训练一只Schutzhund犬进行追踪，也很难让它顺应不同于&服从测试&的那些规则。

It is difficult to train a schutzhund dog to track in such a way that the pressure needed to get the dog to slow down and conform to the rules does not bleed over into the obedience work.

工作犬，训犬网，训狗网，狗友网，中国工作犬网，工作犬网，宠物用品，养犬技术，训犬用品，训犬技术，训犬视频，宠物训练，猎犬训练，训犬学校$ U/ _0 ^3 L e% s6 k

"Hydraulic safety valve" is widely used in hydraulic power systems and hydraulic equipment of safety devices, pressure devices can be limited, is a special valve, which is different from the conventional valve, the traditional use of mechanical valves metal spring as a driving force, can only be limited to low pressure, encountered more BALANCING VALVES than 10Mpa pressure limit pressure can do to increase the volume of pressurized design, the traditional role of the high-pressure valves and high pressure hydraulic power systems and hydraulic equipment The limit pressure of necessity is bulky and complicated structure, difficult to manufacture large, high production costs; in the course of the fatigue of metal spring parameters change fluctuating pressure limiting Ambassador to regular revision to ensure the normal use.

&气动液压安全阀&是目前广泛应用于液压动力系统和液压设备中的安全装置，也可以作限压装置，是一种特殊的阀门，它不同于传统的阀门，传统阀门用机械金属弹簧为动力，只能限中低压力，遇到超过10Mpa以上的压力限压，闸阀只能做加大体积的增压设计，因此传统阀门作用于高压和超高压的液压动力系统和液压设备的限压时必然体积笨重，结构复杂，制造难度大，产品成本高；在使用过程中金属弹簧的疲劳变化大使限压参数波动大，要经常调整才能保证正常使用。

"Hydraulic safety valve" is now widely used in hydraulic power systems and hydraulic equipment in the safety device could also serve as limited pressure device, is a special valve, unlike conventional valves, conventional valves with mechanical metal spring as a driving force, can only be limited to low pressure, the pressure encountered over more than 10Mpa limit pressure can do to increase the volume of the Safety Overflow Valve booster design, the traditional role of the high-pressure valves and high pressure hydraulic power systems and hydraulic equipment The limit pressure of necessity is bulky and complicated structure, difficult to manufacture large, high production costs; in the course of the fatigue of metal spring parameters change fluctuating pressure limiting Ambassador to regular revision to ensure the normal use.

&气动液压安全阀&是目前广泛应用于液压动力系统和液压设备中的安全装置，也可以作限压装置，是一种特殊的阀门，它不同于传统的阀门，传统阀门用机械金属弹簧为动力，只能限中低压力，遇到超过10Mpa以上的压力限压，只能做加大体积的增压设计，因此传统阀门作用于高压和超高压的液压动力系统和液压设备的限压时必然体积笨重，结构复杂，制造难度大，产品成本高；在使用过程中金属弹簧的疲劳变化大使限压参数波动大，要经常调整才能保证正常使用。

It is so mature to should be in and a pail of gold is dug in intense network market, it is difficult to be returned than entering a day simply, but do not have method, the person is forced come out, so we choose to make time of money guest on-line at the outset, consider a sword to go namely slant sharp edge, chose field of an an unexpected winner, chose a rising market, money guest is online regard China as platform of inchoate online charge to an account, make the market that others distains to do namely, do others to approbate make big market impossibly, make the market that people is not willing to do, make the market that others had not made.

要在这么成熟而又激烈的网络市场里挖掘一桶金，简直比登天还难，但是没办法，人都是被逼出来的，所以我们当初选择做财客在线的时候，就是考虑剑走偏锋，选择了一个冷门领域，选择了一个新兴的市场，财客在线作为中国早期的在线记账平台，就是做别人不屑去做的市场，做别人认可不可能做大的市场，做别人不愿意做的市场，做别人没有做过的市场。

For example, to work to make with this type of ink, which contained flexbible because of the existence of silicone are often prone to overprint and cracking phenomenon, but not to join the silicone resin, and will bring about Ink viscosity and bubbles too many questions, which is very difficult to achieve a balanced each other there is always a certain amount of contradiction, and it has always been in the film class printer materials on flexo business card printing and membership card when faced with a great problem.

比如用这种油不朱打底后，在其上叠印刚印油不朱时，由于硅树脂的活命，不常便当爆发叠印不良和龟裂本体，但若不参加硅树脂，又会带来油不朱黏量不敷和气泡太多的题目，这两方面很难到达平衡，彼此之间老是活命必定的和解，而且这也不断是在薄膜类承印质料上举行刚性版制卡和会员卡制作时所回避的一不小困难。

An Internet professional expresses, the concept of Zhang guest net is very good, but it is very difficult to if rely on function of a charge to an account to want to let fire of Zhang guest net only,rise, the website of this kind of type needs to search breach, to the market pattern of fixed position, trade has detailed program, undertake aggrandizement on the technology at the same time, solve the problem with website stable operation, only such, settle or live in a strange place of rich of true positive-appearing image of ability of Zhang guest net is same, become the community on the net that the netizen cannot not ramble.

一位互联网专业人员表示，账客网的概念很好，但假如只靠一个记账功能就想让账客网火起来很难，这种类型的网站需要寻找突破口，对市场定位、商业模式进行具体规划，同时在技术上进行强化，解决网站运营稳定的问题，只有这样，账客网才能真正像博客一样，成为网民不可不逛的网上社区。【以下内容为IT者网站提供英文翻译，未经授权请勿转载

These couples are the same birds in the forest when disaster come to fly their own classic statement, has become a permanent-set; when disaster strikes and that moment, and sent to the heart of the "I can not leave you" warm days move to plain sense of Xin Wo The truth, has been difficult to find, perhaps an eternal hope; laugh poverty but not prostitution and vulgar talk dirty streets and marketplaces, turned out to be a people's gossip about financing coincides with the secular by default; in continuous destruction of the people at the beginning unyielding humanity; corrupting people's fragile mind.

夫妻本是同林鸟，大难来时各自飞的经典语句，已成为一种永恒定势；当灾难降临那一瞬，发至肺腑的&我不能撇下你&暖心窝感天动地朴实无华的心里话，已很难找到，也许是一个永远的期盼；笑贫不笑娼的低俗市井肮脏之谈，竟然也是人们茶余饭后不谋而合的一种谈资与世俗默认；在不断的摧残着人之初真善美的人性；腐蚀着人们脆弱的心灵。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。